Lathe for turning spirals



(No Model.)

- S. MOORE.

LATHE FOR TURNING SPIRALS.

N'0.319,922. Patented June 9, 1885.

Eiiil WITNESSES IN VEN TOR 4 ATTORNEYS.

. EIERS. Pholo-Lmwgraphnr. Wal

SILAS MOORE, OF CLEVELAND, OHIO.

LATHE FOR TURNING SPIRALS.

SPECIFICATION forming part of Letters Patent No. 319,922, dated June 9,1885.

Application filed October 13, 1884. (No model.)

To all whom it may concern:

Be it known that I, SILAs MOORE, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented certain new and useful Improvements in Spiral-Lathes, of whichthe following is a description.

This invention relates to that classof lathes which are used for turningwork into spiral form; and its object is to feed the work regularlyagainst a revolving cutter, to withdraw the cutter, and to quicklyreturn the work to repeat the operation.

To this end my invention consists in the construction and combination ofparts forming a lathe for shaping work in spiral form, hereinafterdescribed and claimed, reference being had to the accompanying drawings,in which- Figure 1 is a front elevation of my lathe, and Fig. 2 is atransverse vertical section thereof atw x of Fig.1. Fig. 3 is atransverse vertical section at x c, Fig. 1, facing in the oppositedirection to Fig. 2.

A represents the frame of the lathe, having the usual ways or shears, B.

O is the head-stock, and D the tail-stock, both fitted to slidelongitudinally upon the ways B and connected together by longitudinalbars E, which may be rigidly fixed thereto; or they may be madeadjustable, so that the head and tail stocks may be fixed at distancesapart to suit the length of the work. The work is held to be turnedbetween the dead-center F and the line-center G. The center G is fixedin a spindle, H, which is journaled in the head-stock O and providedwith a gear-wheel, I.

J is the feed-screw, journaled in bearings in the frame of the machineand longitudinally slotted to receive a spline, a, of a gear-wheel, K,which is free to slide longitudinally upon the screw, but which is atthe same time confined between bearings 12, so as to be carried alongthereby.

Lis an open-and-shut screw-nut adapted to engage the thread of the screwJ ,or to be disengaged therefrom by the operator. This nut is hung tothe head-stock O, and when engaged with the screw it feeds the carriageforward; but when disengaged it leaves the head-stock means of theintermediate gear-wheels, N and O, which communicate between thegearwheels K and I.

The wheels N and O are journaled in a frame, P, which is pivoted to beswung to and from the wheel I, so that larger or smaller wheels may beengaged, and so that the wheel O may be dispensed with in case it isdesired to out a left instead of a right hand spiral.

Qis the cutter-shaft, journaled in a sash, R, which is fitted to slidevertically in ways S, and is provided with'a handlever, T, by which itmay be raised or lowered to carry the cutting-tool toward or away fromthe center of the work, either while work is in progress or at rest.

U is a notched segment, and V a springlatch on the lever to engage thesegment to hold the cutter fixed at any desired height. Thus with mymachine spirals may be out either right or left handed, cylindrical,tapering, or in any waving pattern required, and the pitch of the spiralmay be regulated at the beginning of each job of work by arranging thegear-wheels in proper relation to the screw.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a spiral-lathe, the combination, with a head-stock and tail-stockfitted to slide upon the latheways, and means, substantially asdescribed, binding the head and tail stocks to each other to move asone, of a spindle journaled in the head-stock, a gear-wheel on thespindle, a longitudinally-slotted screw journaled in the frame of thelathe and means for revolving it, a gear-wheel fitted to slide upon thescrew and provided with a spline engaging the slot in the screw, thelast-named gearwheel being fitted at its sides to bear in thehead-stock, intermediate gear-wheels connecting the gear-wheel on thescrew with the gear-wheel on the spindle, and a nut engaging thehead-stock with the screw, substantially as shown and described.

2. In a spiral-lathe, the combination, with a headstock and tail-stockfitted to slide as pivoted to the lever to engage the said teeth, onepiece on the latheways, of a cutter-spin substantially as shown anddescribed.

dle journaled in a sash fitted to slide to and SILAS MOORE. from theline of the lathe-centers, a hand-le- Witnesses:

5 ver pivoted to the lathe-frame, alink connect- 0. W. CoATEs, ing itwith the said sash, a segment of teeth, U, W. O. COATES,

secured upon the lathe, and a spring-latch, V, T. D. BROWN.

